Ive been using Google Sync on my 9000 (OS 4.6.0.304) for about a year now. As of lately I get this error:
""another sync client has been adding events to the blackberry calendar. to avoid duplicates google sync will not keep these events up to date"
I dont use facebook, looks like that was causing issues for others in some of the threads i checked. I havent added any other "client" as the message states. I've deleted Google Sync and tried to see if this "other" client would update for me, and no dice. I downloaded Google Sync back on the bb and it still gives me that error.
If I set an appointment on the BB, it wont update to google.
If I set an appointment from Google, it does update the BB.
UPDATE: I placed an appointment in my BB and then selected Google Sync. the appt did transfer OTA to my Google Calendar. I then deleted the appt from Google Calendar and re-synced the BB, and the appt is now gone.
Not sure what that message is about, but everything seems to be working.